alter

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To change or make different; modify: altered my will.
2. v. To adjust (a garment) for a better fit.
3. v. To castrate or spay (an animal, such as a cat or a dog).
4. v. To change or become different.

Century Dictionary and Cyclopedia

1. To make some change in; make different in some particular; cause to vary in some degree, without an entire change.
2. To change entirely or materially; convert into another form or state: as, to alter a cloak into a coat; to alter an opinion.
3. To castrate, emasculate, or spay, as an animal.
4. To exchange.
5. To agitate: as, ”altered and moved inwardly,” Milton, Areopagitica, p. 1. Synonyms and Alter, Change, modify, transform, transmute. In general alter is to change partially,while change is more commonly to substitute one thing for another, or to make a material difference in a thing.
6. To become different in some respect; vary; change.

Wiktionary

1. v. To change the form or structure of
2. v. To tailor clothes to make them fit

GNU Webster's 1913

1. v. To make otherwise; to change in some respect, either partially or wholly; to vary; to modify.
2. v. To agitate; to affect mentally.
3. v. To geld.
4. v. To become, in some respects, different; to vary; to change

WordNet 3.0

1. v. cause to change; make different; cause a transformation
2. v. remove the ovaries of
3. v. become different in some particular way, without permanently losing one's or its former characteristics or essence
4. v. insert words into texts, often falsifying it thereby
5. v. make an alteration to